Finding the Fourth Proportional to 2,277.57, 3,417.57 and 978.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,277.57 : 3,417.57 = 978.96 : x
2. Step 2: Convert to fraction form
   2,277.57/3,417.57 = 978.96/x
3. Step 3: Cross multiply
   2,277.57x = 3,417.57 × 978.96
4. Step 4: Simplify right side
   2,277.57x = 3,345,664.33
5. Step 5: Solve for x
   x = 3,345,664.33/2,277.57
6. Step 6: Final answer
   x = 1,468.96